Finding the Third Proportional to 413,856 and 907,200

Step by Step Solution

1. Step 1: Write the proportion equation
   413,856 : 907,200 = 907,200 : x
2. Step 2: Convert to fraction form
   413,856/907,200 = 907,200/x
3. Step 3: Cross multiply
   413,856x = 907,200 × 907,200
4. Step 4: Simplify right side
   413,856x = 823,011,840,000
5. Step 5: Solve for x
   x = 823,011,840,000/413,856
6. Step 6: Final answer
   x = 1,988,643.01